Ghyrson Starn, Kelermorph, and Spitemare

Prerequisites

• Ghyrson Starn, Kelermorph on the battlefield
• Spitemare on the battlefield
• You have a way to deal exactly 1 damage to Spitemare
• You have a way to give Spitemare indestructible

Steps

1. Give Spitemare indestructible, if needed, and then deal exactly 1 damage to Spitemare
2. Spitemare and Ghyrson Starn trigger
3. Resolve the Ghyrson Starn trigger, dealing 2 damage to Spitemare
4. Spitemare triggers, dealing 2 damage to any target
5. Resolve the Spitemare trigger from step 2, dealing 1 damage to itself
6. Repeat from step 2

Results

• Infinite damage